A Lightweight Attribute-Based Security Scheme for Fog-Enabled Cyber Physical Systems

Table 3

Processing times (sec) .

Schemes	Setup+KeyGen (final KeyGen)	Encrypt (1 kB)	Decrypt (1 kB)	Encrypt (1 MB)	Decrypt (1 MB)
First experiment
Guo et al. [6]	0.27	0.15	0.59	175.09	696.16
Odelu and Das [8]	0.18	0.30	0.08	326.7	91.9
Cheng et al. [12]	0.36	0.18	0.31	212.3	367.5
Yamada et al. [14]	0.63	1.54	1.83	1547.5	1838.3
Zhou et al. [9]	0.13	0.12	0.94	153.2	1118.5
Fog-CPS scheme	0.02	0.20	0.035	252.2	43.11
Second experiment
Guo et al. [6]	0.034	0.02	0.05	24.21	62.65
Odelu and Das [8]	0.03	0.09	0.02	96.71	27.28
Cheng et al. [12]	0.05	0.03	0.02	34.89	32.58
Yamada et al. [14]	0.23	0.56	0.26	564.66	288.43
Zhou et al. [9]	0.05	0.20	0.12	20.21	119.75
Fog-CPS scheme	0.008	0.06	0.01	65.29	11.14